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Finding the Fourth Proportional to 30,649.98, 42,301.90 and 28,648.88

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Solution

The fourth proportional to 30,649.98, 42,301.90 and 28,648.88 is: 39,540.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,649.98 : 42,301.90 = 28,648.88 : x
  2. Step 2: Convert to fraction form
    30,649.98/42,301.90 = 28,648.88/x
  3. Step 3: Cross multiply
    30,649.98x = 42,301.90 × 28,648.88
  4. Step 4: Simplify right side
    30,649.98x = 1,211,902,056.87
  5. Step 5: Solve for x
    x = 1,211,902,056.87/30,649.98
  6. Step 6: Final answer
    x = 39,540.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.